Chemistry Particle Diagrams Flashcards

Pure Substances

• Defined as materials with a constant composition, consisting of a single type of particle.
• Types include elements and compounds.

Compound

• A pure substance formed by the chemical combination of two or more different elements.
• Examples include water (H₂O) and carbon dioxide (CO₂).

Element

• The simplest form of pure substance that consists of only one type of atom.
• Examples include oxygen (O) and gold (Au).

Mixture

• Composed of two or more substances that are not chemically bonded.
• Can be heterogeneous (different compositions) or homogeneous (uniform composition).

Types of Mixtures

• Mixtures can include combinations of elements and compounds:
  • Mixture of two compounds involves different chemical formulas without reaction.
  • A mixture of one compound and two elements consists of a compound and additional elemental materials.
  • Mixture of two elements involves two different types of atoms without forming a compound.

Key Definitions Recap

• Pure Substance: Constant composition, includes compounds and elements.
• Compound: Chemically bonded elements.
• Element: Single kind of atom, cannot be broken down.
• Mixture: Physical combination of substances, retain individual properties.